You see, I initially started training under the misconception that developing calluses was part of the 'toughening' process, so I wrote off blisters as just a part of the training process.
"Not true", says Christopher. If you're developing blisters or calluses while running then that indicates a flaw in your technique. I've since made some adjustments to avoid further 'pushing off' from the forefoot and try to lift the foot straight up, much like a boxer does in the corner before going into the ring. It's more of an up/down bouncing feel.